The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 1978
Filed:
Jan. 06, 1977
Bruce B Myers, South Bend, IN (US);
Robert W Jackson, South Bend, IN (US);
The Bendix Corporation, Southfield, MI (US);
Abstract
A hydraulic brake booster includes a housing defining a pressure chamber and an inlet port communicating pressurized fluid to an accumulator and the pressure chamber. The housing includes a bore which slidably receives a charging valve and sealingly receives a check valve. The charging valve sealingly engages the housing bore via a sealing ring in one position and is pressure responsive to move toward a second position abutting the check valve to open communication between the inlet port and the accumulator. A stem is slidably carried in a passage in the check valve and the stem is received in a slot in the charging valve. An operator actuator is engageable with the stem to unseat one end of the stem from the check valve so that pressurized fluid from the accumulator is communicated to the pressure chamber. Moreover, the slot on the charging valve permits communication between the inlet port and the pressure chamber when the accumulator pressure is below the pressure at the inlet port and the operator actuator is unseating the stem from the check valve. In addition, the charging valve and housing bore include substantially parallel tapered surfaces that oppose frusto conical surfaces on the sealing ring that are substantially parallel to the tapered surfaces and between the housing bore and charging valve to seal the accumulator from the inlet port when the sealing ring is engaging the housing bore and the charging valve.